Attachment for sewing machines



A. H. DE VOE. ATTACHMENT FOR-SEWING MACHINES APPLICATION FILED OCT. 29, I919. I 1,420,41 4;, Patented June 20, 1922.

2 SHEETS-SHEET I.

Y Bl/WI ATTORNEY A. H. DE VOE.

ATTACHMENT FOB SEWING MACHINES.

APPLICATION FILED on: 29, 1919.

Patented Julie '20, 1922.

2 SHEETSSHEET 2.

5 ETIIII 'T 5 5 A N N are. "r Essie ALBERT n. DE VOE, or wRsTrIELn, NEW JERSEY, AssreNoR To THE SINGER MANU- FACTURING COMPANY, A CORPORATION on NEW JERSEY.

ATTACHMENT FOR SEWING MAGHTNES. I

Specification of Letters Patent. Patented June 29 1922 Application filed October 29, 1919. Serial No. 334,139.

To all whom it may concern:

Be it known that T, ALBERT H. DE Von, a citizen of the United States, residing at Yi estfield, in the county of Union and State of New Jersey, have invented certain new and useful Improvements in Attachments :or sewing Machines, of which the following is a specification, reference being had sitions to permit the completion of a fold on tubular work.

The objects are attained in the present attachment which comprises a base-plate upon which are slidably mounted two supporting plates one carrying a folding scroll and the other supporting a cooperating tongue about which the fabric is folded. An adjustable edge guide is located beneath the folding tongue and projects above the surface vof the base-plate to guide the edge of the fabric. The folding scroll and folding tongue are each adjustable with respect to the edgeguide to either of two operative positions whereby folds of different widths are pro: duced, it being understood that the width of the fold is determined by the distance from the edge-guide to the edge of the folding tongue about which the fabric is folded. The folding scroll and tongue may be retracted in opposite directions to inoperative positions when a fold is not desired or to permit the completion of a fold on tubular work.

The invention may be used advantageously in the manufacture of undershirts and will be described in connection therewith only as one product in which the advantages of the various adjustments may bentilized.

An embodiment of the invention is illustrated in the accompanying drawings in which Fig. 1 is a sectional elevation of a portion of a sewing machine upon which is fitted the present attachment adjusted to form a narrow fold. Fig. 2 is a plan view of the parts shown in Fig. 1. Fig. 3 is a view similar to Fig. Qbut showing the foldingscroll and tongue adjusted to form a wide fold. Fig. 4 is aright end elevation of certain parts shownin-Fig. 1. Fig. 5 is a sectional View takenjon the line 55, Fig.

8, and Fig. 6 is a view of one product of the present invention.

: Referring more. particularly to the draw- I ings, the attachment isshown as appliedto a sewing machine provided with a clothplate 1, feeding mechanism 2,'presser-fo0t p1,.

and stitch-forming mechanism comprising a plurality ofneedles 3 and. a complemental looper 4, whereby a; plurality off seams is formed-on one side of a fabric and are connected on the oppositeside of the fabric by p, c,

a cross-thread as is commonly used to cover the raw edge of a folded fabric. The line of seam formation produced by the stitchforming mechanism isrepresented by the dot-dash lines y in Fig. 3. i

The attachment is preferably formedwith a base-plate 5 secured upon a slide-plate 6 adapted to be inserted within an attachment holder 7, carried bythe cloth-plate 1, and held therein by a frictional engagement with a retaining spring 8.. The base-plate 5 is formed with an undercut slideway 9 within which .is slidably mounted the shank. 10 of an edge-guide 11 adaptedto determine the position of the edge of the fabric with respect to the needles and held in adjusted positions by a set-screw 12 threaded through the shank 10 and bearingupon the surface 13 of the slideway 9.

An open sided folding scroll 14, provided with a shank 15,is also adjustably mounted within the slideway 9 and cooperates with a folding tongue 16 which projects into said folding scroll and which isl= adjustably mounted upon the shank 10 of the edgeguide 11 and guided thereon by a downturned lip 17, a block16 carried by the unvder side of the folding tongue and a screw 18 projecting through a slot 19 in the tongue 16 and threaded into the shank 10 of the edge-guide. The folding scroll and folding tongue are maintained in adjusted positions by means of springdatches 20 and 21,, respectively; secured to theunder side of the plate 5 and having portions 20 and 21, respec- V scroll and the latch 21 cooperating with notches 21 and 21 in the lip 17 of the folding tongue 1'6.

In the operation of the attachment when used for manufacturing undershirt-s the folding scroll and folding tongue are adjusted to the positions shown in Figs. 1 and "2 and a narrow fold is formed at the neck of the shirt 8 beginning at a .point I) at the front thereof andextending to a point 0, :or until the reinforcing piece a is reached. The folding scroll is then retracted to the position shown indotted lines, Fig. 2, with the latch 20 engaging the notch 20 'The edge cl of the reinforcing piece 7' is then guided by the edge-guide 11 and covering 7 stitches are formed. thereover attaching it to the b'ody of the shirt until the point e is reached. During the stitching of the edge of :t-he reinforcingpiece the folding tongue .is maintained in its initial position and as-:

s'is't's holding down said reinforcing piece. When'the point c has been reached "the folding scroll is returned to its initial position and a like narrow fold is 'formedto the point I When it is desired to form a .wide fold w such 'as is used about the sleeves and bottom Of filIB undershirt, which fold in the present instance is substantially four times the width of the narrow fold about the neck, and at which time the undershirt is in tubular form, the folding scroll and folding tong'ue are adjusted to the positions shown in Fig. 3, with the latches 20 and 21 engag- Having thus set forth the nature of the invention, what I claim herein is- 1. Angattachment for sewing machines including in combination a. base-i-plate, an edge-guide provided with a supporting shank secured to said base-plate, an opensided folding scroll adjustably secured to sa i'd base-plate and facing said edge-guide,

an adjustably m'ounted folding tongue which projects into said folding scroll, and means for maintaining said adjustable parts in op era ti ve position and permitting the wit 1- d'rawal of the folding tongue from within said folding scroll to permit the completion of a fold on tubular work.

'2. An attachment for sewing machines including in combination a base-plate, 'an e'dfgeguicle secured thereto, an open-sided folding scroll adjustably supported at one side of the line of seam formation and a folding -tongue cooperating with said folding scroll,- said folding tongue being adjustfolding means and edge-guide actingrespectivelyto produce a fold on apiece of fabric and guide the inturned edge thereof, said folding scroll being so constructed and arranged as to permit ofits retraction from said edge-guide to permit the edge-guide to guide the edge of an unfolded fabric.

An attachment for sewing machines comprising a base-plate, an ed e-guide supported thereby, an open-sided folding scroll adjustably supported on said base-plate and facing said edge-guide, a folding tongue overlying said edge-guide and projecting into said folding scroll, said edge-guide, folding scroll and folding tongue each cooperating with the others to produce a fold of predetermined width, said folding scroll and folding tongue also being so adjustably supported and arranged as to permit their retraction in opposite directions to uncover the edge-guide and expose the same to permit it to guide the edge of an unfolded fabric.

5. An attachment for sewing machines comprising a base-plate, an edge-guide, a

folding scroll and a folding tongue each ad justable relative to said edge-guide, and spring latches adapted to engage and hold said scroll and tongue in adjusted ,positions, said latches being secured to the under side of the base-plate and having portions accessible from above the base-plate for retracting said latches.

6. An attachment for sewing machines comprising a base-plate, an edge-guide, a folding scroll and a folding tongue each provided with a plurality of notches and adjustable relative 'to said edge-guide, and spring-latches cooperating with SELlClrllOtCllGS to hold said scroll and tongue in adjusted positions, said latches being secured to the under side of the base-plate and having er tions. accessible from above the base-plate for releasing.saidlatches from said notches.

In testimony whereof, I have signed my name to this specification.

ALBERT in. DE von. 

